const int order = 6;
float xn[] = {0, 0, 0, 0, 0, 0, 0};
float b[] = {0.0184750505552459,	0.0383151887695476,	0.0581553269838493,	0.0662884731464846,	0.0581553269838493,	0.0383151887695476,	0.0184750505552459};

void setup() {
  Serial.begin(115200);
  for(int i = 0; i <= order; i++)
  {
    xn[i] = 0;
  }
}

void loop() {
  for(int i = order; i >= 1 ; i--)
  {
    xn[i] = xn[i-1];
  }
  float t = micros()/1.0e6;
  xn[0] = sin(2*PI*0.5*t) + 0.2 * sin(2*PI*100*t);
  double yn = 0;
  for(int i = 0; i <= order; i++)
  {
    yn += b[i]*xn[i];
  }
  delay(1);
  //if(k%3 == 0)
  //{
    Serial.print(2*xn[0]);
    Serial.print(" ");
    Serial.println(8*yn);
  //}
  //k = k+1;
  //delay(1);
}